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MILB857CLASSBTYPEA — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MILB857CLASSBTYPEA: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.437 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, hardness_rating: 23.0 ROCKWELL C NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-208-5477, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MILB857CLASSBTYPEA
NSN: 5310-00-208-5477
NIINs: 002085477, 002708807, 002708814, 002759333, 002759336, 002759383, 002759385, 002759391, 002759394
FSC: 5310 — Nuts and Washers
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.437 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
hardness_rating23.0 ROCKWELL C NOMINAL
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats1.250 INCHES NOMINAL IN
nominal_thread_size0.875 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch14
NSN5310-00-208-5477
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MILB857CLASSBTYPEA · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 1.250 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.875 INCHES IN
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY SEMIFINISHED
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND B CLASS
•
NUT HEIGHT: 0.437 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.250 INCHES NOMINAL IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.875 INCHES IN
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY SEMIFINISHED
NONDEFINITIVE SPEC/STD DATAA TYPE AND B CLASS
NUT HEIGHT0.437 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MILB857CLASSBTYPEA?
MILB857CLASSBTYPEA is a NUT,PLAIN,HEXAGON.
What is the NSN for MILB857CLASSBTYPEA?
MILB857CLASSBTYPEA is cataloged in the U.S. Government catalog under NSN 5310-00-208-5477. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.